Active matrix liquid crystal display device having particular capacitance patterns

An active matrix display device, in which a liquid crystal is driven by an electric field having a component parallel to a substrate surface of a display panel,

• on one substrate of which one layer comprising scanning wires and comb-shaped common electrodes as well as another layer comprising signal wires perpendicular to said scanning wires and pixel electrodes, said two layers being patterned through divisional light-exposing, at least said signal wires being periodically on the divisional position,
• the improvement comprising:
• (a) that branch electrodes, each of which is projected from one or both longitudinal peripheries of said signal wires, extended beyond a comb-shaped portion of said common electrode nearest therefrom, and then bent to extend a portion by a predetermined distance parallel to said signal wire,
• (b) that in case where said signal wire on the divisional position is deviated upon said light-exposing, parasitic capacity on the divisional position is made substantially equal to parasitic capacity at positions other than the divisional position by decreasing/increasing parasitic capacity at the divisional position between the bent and extended portion of said branch electrode and said nearest comb-shaped portion of the common electrode according to increasing/decreasing said parasitic capacity at the divisional position between said branch electrode and said comb-shaped portion of the common electrode to make the sum of the parasitic capacities invariable.

An active matrix display device, in which a liquid crystal is driven by an electric field having a component parallel to a substrate surface of a display panel, and which has one layer comprising scanning wires and comb-shaped common electrodes as well as another layer comprising signal wires perpendicular to said scanning wires and pixel electrodes on one substrate of said display panel, said two layers being patterned through divisional light-exposing by assuming divisional positions at least on said signal wires,

• the improvement comprising:
• (a) that auxiliary electrode patterns are arranged, each of which is projected with a predetermined width from said common electrode to be superimposed with said signal wire when viewed from the top and extended by a predetermined distance along the longitudinal direction of said signal wire,
• (b) that in case where said signal wire on the divisional position is deviated upon said light-exposing, parasitic capacity at the divisional position is made substantially equal to parasitic capacity at positions other than the divisional position by decrease/increase of parasitic capacity at the divisional position between said signal wire and said auxiliary electrode caused by decreasing/increasing the overlapped area of the same signal wire and the same auxiliary electrode according to increasing/decreasing parasitic capacity at the divisional position of between said signal wire and the comb-shaped portion of said common electrode to make sum of said parasitic capacities invariable.